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Des. 21 1926.

H. M. PFLAGER CAR TRUCK Filed June 5. 1925 STATES.

ru ns HARRY M. PFLAGER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO COMMONWEALTH STEEL COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF NEW JERSEY.

GAR TRUCK.

Application filed. June 3, 1925. Serial No. 34,706.

My invention relates to railway rolling stock and consists in an improved truck of the general type illustrated in Patent No. 1,279A issued to me September 17, 1918, in which there is a combination of load sup porting springs and compensating springs, the compensating springs normally being inactive but functioning upon momentary removal of the load of the car body from the load supporting springs;

One object of my present invention is to provide a frame for this type of truck in which the familiar truss design of said frame is retained but is modified to accommodate the compensating springs of the particular type of truck referred'to.

Another object of my invention is to pro-- Vide against the accumulation of dirt or other foreign matter in bearing surfaces'orother places where accumulation would be likely to interfere with the operation of the truck.

Another object of my invention is to provide against displacement of any of the springs and, in the event of breakage of one of the main load supporting springs, to pro vide against undesirable lowering of the body supporting portion of the truck.

Another object of my invention is to reduce the width of the side frame and spring stucture, thereby providing greater clearance for the truck wheels and providing a low eccentric movement in the top rail about a longitudinal plane.

Additional minor objects of my invention will be obvious from the description of the detailed construction of the invention.

In the accompanying drawings which illustrate a preferred embodiment of my invention V Figure 1 is a top view and in part a horizontal section through one longitudinal half of my improved truck.

Figure 2 is in part a side elevation and 111 part a vertical longitudinal section on the longitudinal center line of the truck side frame. :s

Figure 3 is a transverse vertical. section on line 33 of Figure 2.

Figure 4 is a transverse vertical section through the journal box and adjacent portion of the truck'frame.

The truck has the usual axles 1 and wheels 2, the axle journals 3 carrying journal boxes 4 which may be of usual construction except that the tops of these journal boxesare each provided with acylindrical elevation or boss 5 which forms a swivel bearing for the truck side frame.

The side frame is shown as a one-piece casting and between the journal boxes includes a top chord 7 and a depressed bottom chord 8. These chords are united over the journal boxes in a portion 9 having a box-shape cross section and provided with depending portions 10 which slidably engage the sides of the journal box. The portion 9 is also provided with a circular seat 11 which rests upon the journal box boss 5. Seat 11 has a depending flange 12 which overhangs the bearing on the journal box and guards against the admission of cinders and dirt to the bearing surfaces of the box and frame. Cooperating projection 13 on the journal. box and corresponding recess 1 1 in the frame center the frame and box bearing and also receive the bolt 15 by which the frame and box are held in as sembled position. I

The lower chord 8 of the frame is provided with a seat 16 for the load supporting springs 17 Suitable upstanding lugs 18 on spring seat 16 prevent the lateral displace- -ment of the load springs.

Springs 17 carry a cap 19 which forms a seat for the compensating springs 20 and positions these springs. by centering lugs 6. These compensating springs carry a cage 21, the upper portion of which has an upwardly convex bearing for the upper center bearing 22 which supports the car mounted upon the truck. Member 22 is provided with depending flanges 23 which guard against the entrance of dirt or other foreign matter to the bearing surface.

It will be noted that the top chord '7 of the truck frame is provided with a vertical opening at its center to permit the passage therethrough of spring cage 21 and the enclosed springs. At the ends of this opening the chord hastransverse walls 24 which ex tend slightly beyond the sides of the chord and are flanged as indicated to form a channel-shape which receives and guides the adjacent portion of the spring cage 21.

The central portion of spring cage 21 includes a cylindrical structure 26, the lower end of which contacts with cap 19 before compensating springs 20 are fully compressed. This is the normal relation of the spring cage compensating springs and cap iitl . hanger pin 30. Flanges 31 on oneof the 19'and the load is therefore normally carried on the load springs 17 irrespective of springs 20. The ends of cage 21 extend downwardly inside the vertical walls 24 of the frame and form guides for the load springs 17 and for the spring cap 19. To avoid pockets 4 for dirt at the lower ends of the channels formed by walls 24:, the flanges on these walls are cut away as indicated at 27 in Figure 2.

y The top chord 7 of the frame hasa lateral projection 28 provided with spaced vertical ears 29 which provide bearings for a brake ears 29 rovide forthe mounting of a cotter 32 whic h extends past the head of pin 30 and prevents its accidental removal. This arrangement eliminates the necessity of extending the other end of the pin and the "PI'OVlSlOIl of a cotter therethrough and greatly facilitates the ap lication and re- I moval of the pin and the rake hanger for repair or other purposes.

I In Figure 2 I illustrate a single load spring and two separate compensating springs. It is to be understood'that each of these springs preferably includes a set of two or three springs as indicated in Figures 1 and 3 and as is customary in car truck construction, the showing of the complete set in each'figure being eliminatedto avoid confusion.

Tie bars 33 and portions of the brake rigging are sho'wn in theposition which they occupy when assembled with the truck but L form nopart of my present invention.

It isto be noted'that the top of cage 21 extends laterally 'overthe' top chord 7 of the truck frame and in the event of breakage or removal of one or more of the load carrying springs 17, the downward movement of cage 21' and its loadwill be limited byt-he engagement of the laterally extendingportion of cage 21 with the top of the sideframe, thus avoiding undue lowering of one point of support for the load.

Obviously, the 1 details of my invention maybe varied without departing from the spirit thereof and I contemplate such modifications as are'included in the scope of the following claims.

I claim: 1. In a car truck, a frame including a horizontal top chord and a depressed bottom chord, spaced posts between said chords providing a lateral opening between them, said. top chord having a vertical opening for springs carried by said bottom chord.

2. In a car truck, a frame including a top and. abottom chord, said top chordbeing box-shape in cross section and having a vertical opening for springs carried by said bottom chord. 7

3. In acar truck, a frame including a top and a bottom chord, said top chord having a vertical opening, a spring cage slidable through said opening, and springs retained width from its ends toward its middle, a

vertical opening in the middle portion of said chord, and transverse walls across the 'ends of said opening.

5. In acar truck, aside frame including top and bottom chords, said top chord being box shhpe in cross section and increasing in width from its ends toward its middle, a vertical opening in the middle portion of said chord, transverse walls across the ends of said opening, and a spring cage supported on said bottom chord and slidable through said opening in the top chord.

:6. In a car truck, a side frame including top and bottom chords, said top chord being box-shape in cross section and comprising a middle portion with parallel sides and adjacentportions with converging sides, there being a vertical opening through said middle portion, and vertical transverse walls connecting said sides "at the angles bet-ween their parallel and converging portions.

7. In a car truck, a truck side frame, truck load supporting springs mounted on said frame, and compensating springs having their axes spaced longitudinally of the truck and located between said load springs and the truck load.

8. In a car truclga'truck side frame, a group of truck load supporting springs mounted'on said frame, and compensating springs alignedlongitudinally of the truck and located substantially above said group of load springs.

9. In a car truck, a truck side frame provided with a spring seat extending laterally of the remainder of said frame, and load supporting springs mounted on said seat and projecting laterally beyond said frame, and compensating springs carried by said load springs and located between the planes of the sides of said frame.

10. In a car truck, a truck side frame provided with a spring seat, load springs on said seat with their axes spaced transverselv of said frame, and compensating springs carried by said load springs with their axes between the planes of the axes of said load springs.-

11. In a car truck, a truck side frame having a top and a bottom chord, a vertical opening in said top chord, load springs seated on said botom chord and projecting lat-- erally beyond the vertical planes of the sides of said top chord, and compensating springs carried on said load springs and extending through said opening.

12. In a car truck, a frame with top. and bottom chords, said top chord being box- .slidable between said transverse walls and through said openings.

13. In a car truck, a frame with top and bottom chords, said top chord being provided with a vertical opening in its top and bottom walls intermediate its ends, transverse vertical walls at the ends of said openings, each having a vertical flange extending inwardly of said openings, and a spring cage slidable through said openings and guided by said flanges.

14. In a car truck, a frame with top and bottom chords, said top chord being pro-- Vided with openings in its top and bottom walls intermediate its ends, channel-shape vertical walls at the ends of said opening facing each other, and a spring cage slidable through said. openings and retained and guided by said channel-shaped walls.

15. In a car truck, a frame including a top and a bottom chord, said top'chord having a vertical opening, a sprlngcage in said opening, springs supporting said cage, a convex top on said cage, and a load carrying member having a concave lower face mounted on said cage top.

16. In a car truck, a frame including a top and a bottom chord, said top chord raving a vertical opening, a spring cage in said opening, springs supporting said cage, a top on said cage, and a load carrying member mounted on said cage top with a depending flange extending below the edge of said top to exclude foreign matter from between said top and member.

17. In a car truck, a frame including a top chord and a bottom chord, springs on said lower chord, a spring cap carried by said springs, secondary springs on said cap, a cage carried by said cap and secondary springs and movable through said top chord, and a downward extension on said cage adapted to guide said first-mentioned springs.

18. In a car truck, a side frame casting having an integral top and an integral bottom chord, a portion of said bottom chord forming a spring seat, there being an integral lug on the edge of said spring seat for holding a plurality of spaced springs, mounted on said seat, against transverse movement off of said seat.

19. In a car truck, a frame including a spring seat and vertical walls adjacent said seat, a spring cage slidable vertically in said frame and guided by said wall, downward projections on said cage adjacent said walls, and inclined surfaces between said walls and spring seat to avoid accumulation of dirt on said'spring seat beneath 'said projections.

20. In a car truck, a frame including a spring seat andvcrtical channel-shape walls adjacent said seat, a spring cage slidable vertically in said frame and extending into the channels of said walls and guided thereby, the flanges of said walls being cut away adjacent said spring seat to avoid pockets for dirt at the lower ends of said walls.

21. In a car truck of the class described, a side frame including a top chord, an opening in said top chor for compensating springs, a loadbearing normally supported by said springs above said top chord, and interengaging surfaces on said top chord and load bearing for limiting downward movement of the latter.

22. In a car truck of the class described, a side frame with an upper and a lower chord, load springs carried on said lower chord, compensating sprin s carried on said load springs, a cage for said compensating springs, and cooperating elements on said cage and top chord for limiting downward movement of said cage.

23. In a truck of the class described, side frame, load springs mounted thereon, compensating springs carried on said load springs, a load bearing carried by said com-- pensating springs, and members on said frame and bearing for supporting the latter directly on said frame in the event of the failure or removal of said load springs.

52%. In a car truck, wheels, axles, journal boxes on said axles, an elevated boss on the top of each of said bosses forming a bearing for the side frame, and a depending shoulder on said side frame surrounding said boss to exclude dirt from the bearing sur faces.

25. In a truck of the class described, a load spring, a cap carried thereby, a compensating spring seated on said cap and centered thereby, and a spring cage carried by said compensating spring and forming a guide for said cap.

26. In a truck of the class described, a side frame including a spring seat and vertical walls adjacent said seat, load springs mounted on said seat, a cap on said springs, compensating springs carried on said cap, a cage carried by said compensating springs and guided by said walls and extending downwardly between said cap and said walls to form a guide for said cap.

27. In a car truck, a side frame having a lateral projection, spaced ears on said projection forming bearings for a brake hanger pin, flanges on one of said ears for mounting a removable cotter pin behind the head. of said pin to retain said pin in position.

In testimony whereof I hereunto afiix my signature this 28th day of May, 1925.

H. M. PFLAGER. 

